Also guns and firepower aren't the same. As a guy with a sabre with 7 guns on it, I can say that the plant runs out in seconds. These are efficient guns too (natters/debs).
THe sabre may run out quickly, but the amount of damage you may deal and the agility compared too the titan is unmatched.
If you are truly concerned feel free to develop a testing proposal and submit it to gain access to the test server where you can test a wider variety of combat scenarios involving the sabre and report your results so as to get it rebalanced.
I would think mjolnir probably got it well balanced though, he's pretty thorough in his work.
I have a titan, I have sabres. I have no preferance between the two.
You just gotta fly them differently. The way you dodge is completely different. Seven guns on a sabre is all well and good, however it's not actualy that useful in a group fight where sustained fire is a useful thing. That is balanced out between the two by the titan having a plant that can actualy handle quad codies and dual tizzies, while only being a touch slower, and being a damned strange shape.
The titan is hard to hit. The sabre is hard to hit. The titan can fire high energy guns for ages. The sabre has one more guns but smaller plant. Both have advantages and disadvantages. Use them. Work out a style with each that takes them into account.
The gladiator is pretty small, pretty fast and has both a torp and a CD slot. Nothing to complain about there. (I also own a gladiator)
Make a Collector, put Barragers on it. Then, go fight Eagles with Black Widows and Black Dragons with Drakes and Tizonas. When you can win on a regular basis, come make more balance suggestions.